Android :: SharedPreferences Are Not Stored
Nov 21, 2010
My problem is using SharedPreferences. I just created a <PreferenceScreen> which holds inside a <ListPreference> with an array of 5 different values. Very simple! The array of values are different numbers: 1, 2, 5, 10 and 30.Every time I change the setting, the application remembers that and I can see the setting I chose when I access the preferences once again (as an user). Now, in the code, when I retrieve the setting using the key (e.g. getString("delay", default_delay);), I always get the default value, it seems that the SharedPreferences does not find my setting. Can anybody help? I have read about SharedPreferences.getEditor().commit(), but that should be used only when changing settings from the code, not from the UI preferences.
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Apr 2, 2010
Does somebody knows where the file with the actual stored SharedPreferences is located?
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Jun 21, 2011
My first android application has to do with showing activities at different times. All works fine ... except that when I retrieve the shared preferences in an activity activated from the notification manager, all my options are reset to default values.
Similarly, when I try to reinstall an alarm after the phone is switched off, all the previously stored shared preferences options are non-existent.Is there something special that has to be set in the manifest, or do I have to retrieve the context in a special manner? from a broadcastReceiver?
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Mar 3, 2010
I'm just wondering, if there is a limit on amount of data I can store in SharedPreferences. ( and if yes, what limit).
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Nov 19, 2010
I make an app with some activities.
The first is the login.
If I login correctly, I pass to the second activity, and I want download a stream (like twitter), but I cannot keep the session.
I saved user & pass in sharedpreferences, how can i keep the session through all activities?
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Aug 7, 2009
Now that we can Examining sqlite3 Databases from a Remote Shell, is it possible to examine SharedPreferences from adb shell? Since it would be much more convenient to examine and manipulate SharedPreferences from command line when debugging. Or put in another way, in what files SharedPreferences are saved, and how to view and modify these files?
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Jun 23, 2010
I am trying to save the date of file parsing, so that when next time user, opens the application, the date can be checked against the last parsing date. I am using shared preference to save the data and retrieve it, but getting error. here is the code:
SharedPreferences settings = getPreferences(0);
String today = new Date(System.currentTimeMillis()).toString();
SharedPreferences.Editor edit = settings.edit();
System.out.println("******** Today : " + today);
edit.putString("lastdate", today);
String fetch = settings.getString("lastdate", "0");
System.out.println("******** Fetch : " + fetch);
txtTest.setText(fetch);
but I am getting null pointer error. am I missing something?
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Feb 7, 2009
I'm implementing a feature that requires a password, is it safe to store using SharedPreferences.Editor? Is there another recommended way for storing passwords?
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Mar 6, 2009
I've just tracked down a weird bug in our app where SharedPreferences were failing between power cycles of the phone.
It turns out that one of the strings we were saving had an "&" in it. When I look at the xml that is being persisted I see that this is being encoded as && instead of just &
This means that when you come to read the settings back you don't get any values at all. Is this a known issue? I see lots of posts about preferences dissappearing, but nothing about this.
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Sep 10, 2010
How do I delete SharedPreferences data for my application?
I'm creating an application that uses a lot of web services to sync data. For testing purposes I need to wipe out some SharedPreferences values when I restart the app.
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Oct 6, 2010
If not, is there any workaround? I have an array list of objects that have a name and an icon pointer. I do not want to use a database.
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Sep 28, 2009
I'm trying to prepare an update to one of my apps and I just realized that the updated version cannot read or write over the previous version's SharedPreferences.
Some details: * I'm using the 1.6 SDK and compiling for 1.5.3. * My androidmanifest.xml does not have a sharedUserId (I didn't think I need one if I was not sharing data between different apps).
How to reproduce: * Install my current app from the market * Run the app * Exit and save the setting - invoking SharedPreferences Editor commit (it's using MODE_PRIVATE) * Now install my new update (via a browser download) * Run the app * Everything works fine * Exit & Save *** Now reboot the phone * Run the app again ==> Can no longer access old data or write over it!!
Did I do something wrong? Is it because of the sharedUserId thing? Is it because of the way I'm testing - via market then browser? Why is LogCat reporting a UID change? ==> mismatched uid: 10031 on disk, 10046 in settings; Can I recover from this? I don't want to delete all of my users' data. error ...
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May 30, 2010
I'm having a hard time figuring out the best way to pass simple values from onPause and onResume in the Android activity lifecycle. I understand how to use get and put extra bundles for activity to activity data, but does that work for passing data between the same activity? Should i used SharedPreferences?
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Oct 12, 2010
I want to change the android sharedPreferences save path,the sharedPreferences save in /data/data/xxx.xxx.xxx/shared_prefs,i want to change path to /sdcard. how i do?
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Sep 2, 2010
From what I can incur out of the SharedPreferences documentation, I can update a preference, add one or clear all preference values in a shared preference file.
But I want to completely clear everything inside a shared preference file, not just the values, but the preferences they refer to as well.
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Aug 5, 2010
Currently, I'm using the following code across all of my activities in my app to store application level variables and carry values between activities..
prefs = this.getSharedPreferences("MyPrefs", Context.MODE_PRIVATE);
I didn't have a PreferenceActivity prior to this, but now I do and I am looking to store a few user prefs from this new PreferenceActivity in the same sharedPreferences tag, "MyPrefs".
I know I can access the PreferenceActivity SharedPrefs from my activities via
prefs = PreferenceManager.getDefaultSharedPreferences(this);
but I would like those values saved to my current sharedPreferences tag, "MyPrefs", but I'm not sure how to do this.
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Jul 19, 2010
I love how SharedPreferences work in android and I would like to know if there is an easy way to save them to another file so I could load a previous instance of the prefs and vice versa. Basically when you load this file, all the preferences would change to how you had it before at once. I want to be able to swap 3 or 4 different versions of the same pref keys in this way. Is there an easy way to do this?
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Mar 9, 2009
We have an online multiplayer game that saves some login information in the SharedPreferences. Our app is copy protected and everything was going really well until this weekend when we released an update for it. It seems that at least some of the people are having their SharedPreferences deleted when they updated too the new app. As you can imagine our users are furious because they're all loosing their profiles, and our ranking is dropping fast.
We've tried to reproduce this a hundreds ways but are unable. We're wondering if this could be related to installing a copy protected app over a copy protected app? Since that's the only situation we haven't tested and can't test.
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Sep 2, 2010
I want to store a time value and need to retrieve and edit it. Can somebody guide me here with a sample code/project please?
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Feb 3, 2010
Why are my SharedPreferences suddenly deleted, after I updated my game in the Market?
Here is the logcat...
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Oct 23, 2010
How can I retrieve SharedPreferences for a widget during an update pushed by a broadcast receiver?I have a static BuildUpdate method on my AppWidgetProvider, but I cannot work out how to retrieve my shared preferences as I do not have an appropriate context.
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Sep 14, 2009
We want to store credentials for a user to a web service so the user doesn't have to repeatedly login, but we're concerned about security. We can't store a hash on the database, but we could probably use JCE encryption locally.
Is the content in SharedPreferences secured on the Android device?
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Sep 14, 2013
How to delete an item from a ListView.
I have a layout which includes the listview, an edittext and a button. On button click, the edittext's string is added to the listview. Clicking on a listview item opens a dialog which asks for confirmation to delete that item. When confirmation is received, the item appears to delete. But when the delete button is clicked on another item, the item deletes, but the previous item reappears in its spot. From my limited understanding, I assume that the item doesn't delete from the SharedPreferences, and so when they are loaded again, the item reappears. I've tried clearing the SharedPreferences before saving after delete, but this didn't work (though I could've been doing it wrong).
I've included the whole class incase to test it out in IDE. I understand there are a lot of unneeded objects and the code is quite messy which is a result of me screwing around with the code to try and get this to work. Though everything works as it should, aside from deletion.
[HIGH]
package com.example.send2omni;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
[Code]....
And here's the layout to save some time:
[HIGH]
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
androidrientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
[Code]...
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Nov 11, 2010
I have an Android library project that makes calls to PreferencesManager.getDefaultSharedPreferences.
I have 2 version of my app, paid/free, and they are not able to access the preferences stored by the library code.
Can someone tell me the right way to store values in SharedPreferences in library code and have the values available to projects that include the library?
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Oct 19, 2009
I want to know where the xml schema is stored in Android, which is the schema for androidmanifest.xml file. In androidmanifest.xml file I have the namespace as "http:// schemas.android.com/apk/res/android" . Is this stored locally or remote anywhere?.
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Aug 5, 2010
My guess is that there is an advantage to having many things stored on my SD card on my Droid (like freeing up main memory to make sure the speed and efficiency are there).
However, thus far, I have received NO PROMPTS when installing anything (apps, pictures, etc) regarding where I would like things to go. Also, I just pulled up "SD Card and Phone Storage" on my device and it says "SD Card- Total Space 1.86GB, Available Space - 1.86GB" (clearly nothing there!)
Why am I never getting prompted with an option to store things (like photos I transfer from my Desktop) to the SC card?
Can someone walk me through this and also suggest what things SHOULD be going on my SD card to make my device work smoothly?
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Nov 11, 2010
I want to restore my old SMS. However, I don't know what app should I serach and restore.
If I'll know the exact app, I could restore "Data only".
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Jan 31, 2009
I have tried searching the forums for an answer with no success. I am hoping there is a way of saving "X" amount of G mail emails to the phone rather than them being accessed via a data connection. I recently went on holiday and wanted to access emails that contained flight references etc that I had already received before traveling. However, I didn't want to connect to a Roaming carrier for a connection. Basically, is there a G mail client on the G1 that can store messages?
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Feb 2, 2010
How System Settings (eg, volume, brightness) stored in Android and where?
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Apr 6, 2010
I have rather annoying SD Card saving question: How do i know if a number is stored on my SD Card? I only ask because i recently got my Droid replaced No worries, nothing really wrong happened to it, just the power on/off button got like stuck, it worked fine just had to push it down kinda weird, anyhow took it in to get looked at and my friend was ill just replace it and get a new one ! he works verizon, so got a new droid ! Anyways, i figured all my numbers were stored on the SD Card, but lo and behold i lost about 2-5 numbers, but the weird thing was, it saved like the name and profile, even the email, but not the number?? So i was wondering if i could see or find out which numbers were stored on the SD Card and which on the phone?
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